With field science the devil is normally in the detail. We may be nearing the end of the expedition, but fieldwork continues apace. Entering the home straight, we still have to continue with camera trapping, mist netting, flush surveys and our programme of small mammal trapping has also commenced. As you may have realised by now, the small things in the fynbos really do matter, as part of understanding the bigger picture.
Assessing the small mammal fauna via the use of live (Sherman) traps enables us to better understand another part of the prey base for some of our resident predators. The various mice and shrew species in the area could form an important part of our feline predators’ diets.
However, we need to know what we have, where, and get a gauge on their relative numbers. Cue the need for yet more empirical science! The team set out 50 sherman traps up and over the ridge line of Signal Hill – so called as it is the nearest place to get a mobile phone signal. This not only gives a gradient of habitat types and aspects, it also means those craving a signal (Scott & Jim) are more than willing to climb the ridge – nothing like motivation!
Similar to our big mammal (leopard) trap, the small mammal traps are checked twice a day, and any captures are documented before being released. The trick is finding them again. The results blew our expectations, both in terms of numbers and variety in any single trapping session. The captures far exceeded those we achieved last year, but again focussed on Namaqua rock mice, striped field mice and Sengi (elephant shrew). Clearly there is still much to learn about the smaller fauna of this area of the fynbos.
The flush surveys are also proving useful for demonstrating the levels of diversity and abundance of other vertebrate (mammal and bird) species. As well as keeping our team relatively fit – you know when you have walked several kilometres through the fynbos. At least the teams get to ride out to the survey and/or collected courtesy of our Rangers from Ford South Africa.
With our final round of mist netting planned and camera trap collection still to complete, we are slowly beginning to pull together the results from the last couple of weeks. Suffice it to say that simple and well-tested techniques, combined with a bit of hard graft usually deliver results, adding more detailed ‘colour’ to our evolving scientific picture.